5 Signs Your HVAC Needs Evaporator Coil Replacement

Aug 01, 2022

Your AC unit’s evaporator coil is an essential part of your home’s HVAC system, as it contains refrigerant and is responsible for absorbing the heat from your indoor air. The coil also helps to keep your home dry and cool, ensuring your house's humidity stays at a comfortable level. Due to the importance of your evaporator coil to your system’s performance and your comfort, any homeowner should be aware of the main signs the coil needs replacement.

1. Water Leaks

If you notice a lot of water leaking from your AC unit, your evaporator coil could be damaged. As these coils age, their interior lining can erode, resulting in water leaks. Another cause of a leak could be frost build-up on your coil that floods your condensate line after it thaws. While seeing some water around your unit is normal due to condensation, you’ll want an HVAC technician to inspect your evaporator coil if you notice a significant amount of it.

2. Warm Air

Since your evaporator coil evaporates the heat in your home’s air, damage to it can make it so your HVAC unit starts blowing warm air. Without the coil working properly, your system won’t remove the warm air in your home, leading your unit to struggle to cool your home. A unit that blows warm air might also be due to an issue with your exterior unit or the compressor. An HVAC specialist can inspect your unit and find the root cause, replacing the coil if necessary. 

3. Corroded Lines

If your evaporator coils have corroded, small leaks can form and cause your coils to not work as efficiently. Corrosion usually occurs due to continuous frosting and defrosting on the line or chemical sprays that mix with condensed air that interacts with the evaporator coil. A main sign of corrosion is if your drain pan or the coil’s surface has an oily substance on it. Typically, corroded evaporator coils will need replacement.

4. Odd Noises

Another key sign you might need to replace your evaporator coil is if you start hearing odd noises from your AC unit. You’ll want to look out for banging, hissing, or clanging noises in particular, as these sounds are often associated with a damaged evaporator coil. Hissing could mean you have refrigerant leaking from your coil, while banging sounds often indicate cracks or debris are harming your coil. Even if your evaporator coil isn’t at fault, strange noises always mean you need an inspection.

5. Extremely Dirty Coils

When you don’t have someone consistently cleaning your AC unit’s evaporator coil, chances are high your evaporator coil will break down earlier. Since dirt and various types of debris will build up on the coil and eventually lodge into it, an extremely dirty coil could cause corrosion that can’t be repaired. Coils that have corroded due to dirt will usually need to be replaced, so it’s a good idea to have an HVAC technician regularly clean your coils and the entire system.

Choose Newcomb and Company for Evaporator Coil Replacement Services in Raleigh

If your HVAC system shows any of the signs above, you can turn to Newcomb and Company for evaporator coil replacements in Raleigh, Wilmington, and the surrounding areas. Our HVAC technicians can provide an in-depth inspection of your system and repair or replace your evaporator coil when it’s the source of an issue. We also offer annual maintenance contracts that ensure you receive regular HVAC inspections to help prevent unexpected break-downs and increase your equipment’s lifespan.

Learn more about our HVAC repair and replacement services today. If you have any questions or want to schedule an appointment, please contact us.

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